Align layers for ARC notification surface to pixels

ash/common/accelerators/debug_commands.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/accelerators/debug_commands.h"
 
 #include "ash/common/accelerators/accelerator_commands.h"
 #include "ash/common/ash_switches.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/system/toast/toast_data.h"
 #include "ash/common/system/toast/toast_manager.h"
 #include "ash/common/wallpaper/wallpaper_controller.h"
 #include "ash/common/wallpaper/wallpaper_delegate.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
+#include "ash/common/wm_window_property.h"
 #include "ash/root_window_controller.h"
 #include "base/command_line.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/compositor/debug_utils.h"
+#include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/debug_utils.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 namespace debug {
 namespace {
 
 void HandlePrintLayerHierarchy() {
@@ skipping 20 matching lines @@
                           int indent,
                           std::ostringstream* out) {
   std::string indent_str(indent, ' ');
   std::string name(window->GetName());
   if (name.empty())
     name = "\"\"";
   *out << indent_str << name << " (" << window << ")"
        << " type=" << window->GetType()
        << ((window == active_window) ? " [active] " : " ")
        << (window->IsVisible() ? " visible " : " ")
-       << window->GetBounds().ToString() << '\n';
+       << window->GetBounds().ToString()
+       << (window->GetBoolProperty(
+               WmWindowProperty::SNAP_CHILDREN_TO_PIXEL_BOUNDARY)
+               ? " [snapped] "
+               : "")
+       << ", subpixel offset="
+       << window->GetLayer()->subpixel_position_offset().ToString() << '\n';
 
   for (WmWindow* child : window->GetChildren())
     PrintWindowHierarchy(active_window, child, indent + 3, out);
 }
 
 void HandlePrintWindowHierarchy() {
   WmWindow* active_window = WmShell::Get()->GetActiveWindow();
   WmWindow::Windows roots = WmShell::Get()->GetAllRootWindows();
   for (size_t i = 0; i < roots.size(); ++i) {
     std::ostringstream out;
@@ skipping 131 matching lines @@
     case DEBUG_TRIGGER_CRASH:
       HandleTriggerCrash();
       break;
     default:
       break;
   }
 }
 
 }  // namespace debug
 }  // namespace ash